How Do I Roll Over My 401(k) — and Is It Taxable?

You've been contributing to your 401(k) for decades, and now that retirement is approaching, one of the first decisions you'll need to make is what to do with it. You know you should probably do something, but you're not entirely sure what, and you definitely don't want to trigger a tax bill by making the wrong move.

The good news is that in most cases, a 401(k) rollover doesn't have to be taxable at all. But how you handle it matters more than most people realize, and the first question worth asking might not be the one you'd expect.

Do You Actually Need to Roll It Over?

If your vested balance is over $7,000, your former employer's plan is required to let you keep the money where it is. So doing nothing is an option. But for most people, it's generally not the strongest one.

Employer-sponsored plans typically offer a limited menu of investment options — sometimes a dozen or two funds selected by the plan administrator. Rolling into an IRA opens up a significantly broader universe of investments, giving you the flexibility to build a portfolio tailored to your specific situation rather than choosing from a preset list.

Cost is another factor. Many employer plans charge administrative or recordkeeping fees that simply go away once the money is in an IRA. And depending on the funds available in your plan, you may be paying higher expense ratios than you would on comparable options outside the plan.

There's also simplicity. If you've changed jobs a few times over your career, you may have multiple 401(k) accounts scattered across different custodians. Consolidating into a single IRA can make it significantly easier to manage your investments, coordinate withdrawals, and keep your financial picture organized, especially as retirement approaches and the planning gets more detailed.

That said, there are situations where staying in the plan may be worth considering. The most notable is the Rule of 55: if you separate from your employer during or after the year you turn 55, you can take penalty-free withdrawals directly from that employer's 401(k), even though you're not yet 59½. The moment you roll that money into an IRA, you lose that access permanently. If you're between 55 and 59½ and think you may need to tap those funds before the standard withdrawal age, this is worth evaluating carefully before moving anything.

Some employer plans also offer institutional share classes with exceptionally low expense ratios that may not be available in a retail IRA. If your plan happens to have access to these, the cost advantage could be meaningful enough to factor into the decision.

For most people, though, a rollover into an IRA tends to offer more flexibility, lower costs, and greater control, which is why it's the more common path.

Direct vs. Indirect: The Distinction That Matters

If you decide to roll over, the next question is how, and this is where the tax implications come into play. There are two methods, and the difference between them is significant.

A direct rollover (sometimes called a trustee-to-trustee transfer) moves the money straight from your old plan to your new IRA custodian. The process needs to be coordinated between the two custodians and the paperwork is generally straightforward (contact your plan administrator and IRA custodian for exact details). There's no tax withholding, no deadline to worry about, and no taxable event. The money simply moves from one account to the other.

One thing that catches people off guard: a direct rollover doesn't always mean the money moves electronically. Some plan custodians will issue a paper check, but it will be made payable to your new IRA custodian "for the benefit of" you (you'll typically see "FBO" and your name on the check). If you receive a check like this, don't panic — it's still a direct rollover, not an indirect one, and no taxes have been withheld. But you do need to forward that check to your new custodian promptly. Don't set it aside and forget about it.

An indirect rollover is a different story. With this method, the plan sends the distribution to you — a check made out in your name. And here's where it gets complicated: the plan is required to withhold 20% of the distribution for federal income taxes. You then have 60 calendar days to deposit the full original amount — including the 20% that was withheld — into an IRA. If you want to complete the rollover in full, you have to come up with that withheld amount out of your own pocket and deposit it alongside the check you received.

If you can't replace the withheld portion, it's treated as a taxable distribution. And if you're under 59½, it may also be subject to a 10% early withdrawal penalty.

The withholding trap in action:

Say you're rolling over $400,000. With an indirect rollover, the plan sends you $320,000 (after withholding $80,000). To complete the rollover, you'd need to deposit the full $400,000 into your IRA within 60 days — meaning you'd have to come up with $80,000 from other sources. You'd eventually get the $80,000 back as a tax refund when you file, but only after fronting the money and waiting. If you can only deposit the $320,000 you received, the $80,000 shortfall becomes a taxable distribution and, depending on your tax bracket, could result in substantial federal and state income taxes, not to mention a 10% penalty if you're under 59½.

The direct rollover avoids all of this entirely. For most people, it's the simpler, cleaner, and less risky path.

Two Things Worth Watching

Even with a direct rollover, there are a couple of details that can catch people off guard.

Rolling into a Roth IRA is a conversion, not just a rollover. If you move money from a traditional, pre-tax 401(k) into a Roth IRA, the entire amount becomes taxable income in the year of the conversion. This can be a powerful long-term strategy in the right circumstances, but it shouldn't happen by accident. A large, unplanned Roth conversion can push you into a higher tax bracket, trigger Medicare premium surcharges (IRMAA), and increase the portion of your Social Security benefits subject to tax.

The one-rollover-per-year rule applies to indirect rollovers. If you're consolidating multiple accounts, only one indirect (60-day) rollover is permitted per 12-month period across all of your IRAs. Direct rollovers and trustee-to-trustee transfers are not subject to this limit — another reason the direct method is usually the better choice.

The Bigger Picture

For most people leaving an employer, a direct rollover into an IRA is the straightforward, tax-free move that gives you more control over your investments at a lower cost. But the decision doesn't exist in isolation. How a rollover interacts with your tax situation, your Roth conversion strategy, your income timing, and your broader retirement plan is worth thinking through before you move the money — particularly if the amounts are significant.

A 401(k) rollover is one of those decisions that seems simple on the surface, but the details matter. Getting it right the first time is always easier than trying to fix it after the fact.

Tad Jakes, CFP®, EA, ECA

The scenarios described in this article are hypothetical and are presented for educational and illustrative purposes only. This content is intended for general informational purposes and does not constitute personalized financial, tax, or legal advice. Tax laws and retirement plan rules are subject to change. Please consult a qualified financial advisor or tax professional regarding your specific situation.